Clutch.



1. HRIBAR @L H. GIBSON.

CLUTCH.

' APPLICATION FLED IAN. 22, |917. 1,272,268.. A

2 SHEETS-SHEET l.

ATroRNEY Patented July 9, 1918.

l. HRIBARv & H. GIBSON.

CLUTCH. I APPLlcmoN man JAN. 22. 19u. 1,272,268. Patented July' 9,1918. 2 SHEETS-SHEET 2.

\ .MII w QD m g. N N l I I l "'H l mu N I Xa' 5 M N I be q* INVENTORS ATI'CR N EY invented a newanduseful-Clutch, of'whichf iiivirnn sfrnrns rnfrna rr y onirica.

2l' OE HB'IBAR, OF WAUKEGAN, AND HUTTON GIBSON, 'NORTH CHICAGO, ILLINOIS.

\ CLUTCH.

To all 'whom it may concern.'

Beit known that we, Jon` HRIBAR and HUTTON GIBSON, the former a subjectof lthe Emperor of Austria and the latter a citizen of the United States, residing` respectively, at Waukegan` and North Chicago, 'in the county of Lake and State oflllinois. have the following is a specification. l

This invention; has reference to clutches and itsobject is toprovide a simple form ,l

of clutch interposablebetween a shaft' and y pulley orother structures with the clutch Iclutch element or elements mechanism having a normal tendency toward the clutching position and requiring of a purposelyl directed force v nected together by screws f suitable manner.

the application to release one structure Yfrom the. other. In accordance with the invention, which may for convenience of description be con. sidered as applied to a shaftjand pulley to connect and disconnect them, there is a clutch element or elements mounted on the shaft and made fast thereto and another fast on the pulley and loosely connected to the shaft for engagement with the `clutch element or elements fast on the shaft, withmeans imparting to the clutch elements on the pulley. a

normal tendency toengage the clutch elements on the shaft and with operating means: for moving the clutch elements or structure on the pulley out of engaging relation to the clutch elements or structure on the shaft.

The invention will be best understood from a consideration of the following detailed vdescription, companying specification, ing that whilethe drawings show a practical form of the invention, the latterA is not confined to any strict conformity with the showing ofthe drawings, modified so long as such lchanges and modifications come within the scope ofthe append'- ed claims.. I A Y In the drawings Figurev 1 'is r lmounted on a shaft with the latter shown in cross-section and embodying the invent-ion, a portion of one side of the` pulley being .A

broken a-wayvto reveal interior structure- Specification of Letters Patent.

tion of the pulley and are disposed taken in connectionwith the ac-v drawings forining part ofthiswith lthe further understand-A but may be changed and an elevationy of apulley lfree ends 15 eccentrically ltionlto fthe lpin 14 and so related .to the pe- Patented July 9, 1918.

Application filed January 22, 1917. Serial No. 143,801.

Fig.` 2gis a section of the structure on a plane perpendicular to the axis of rotaabout midwayof the thickness of the pulley, sho-wing some parts -k in elevation and indicating in dotted lines certain structures removed by the section.

Fig. 3 is a section on the line33 of Fig. 2'. n n

Figs. 4 and 5 are perspective views of de tails.Vv 'f i While the ous structures for invention yis applicable to variinterposition between ymoving parts to couple or uncouple them, it

is shown inthe drawings withreference to a shaft l fand a pulley by keys 8 or in any The collars are arings as three in number, although the nummay vary.V The arms are A ber of such arms l 2, the latter compris- 'y Aing two face plates 3, 4, respectively, con- 6 are two collars 7 l equidistantly spaced one from the other in y a circular series, and

one hundred and twenty degrees apart.

This ear ris .shown in the gralwithfthe particular .arm on which it. i

One of thearms is provided when three in number i formed Vand in projecting relation thereto,l

but it vwill be understood that the ear may be otherwise constructed and arrangedwith respect to the arm carrying it.' Straddling each armrlO is a block. 12 having legs 13 on opposite sides of the respective'arm10` and l the arm and legscfthe blockstraddling 4the arm V are traversedby., a, pin 14 connecting etheblockl and arm and constituting a pivot..

The, legsl have itheir curved with relav curved ends 15 will engage and cramp against the collars 7 when the block 12 is rocked .in one direction and move out of such cramping relation when the block is rocked in the other direction. Each block 12 at the end remote from the cramping sur-V faces 15 is mounted on a pivot pin 16 carried by the members 3 and a of the pulley 2, the arrangement being such that when the disk 9 is rotated about the shaft l the pins 14 are moved with relation to the pins y16 to cause the rocking of the blocks 12 to bring the cramping surfaces 15 into engagement with the collars 7 or to move them away from the collars7.

Extending through the pulley 2 adjacent to one of the armsl() is a spindle 17 journaled in the face plates 3 and 4 and extending beyond the face plate 4, such extension being indicated at 18. On the spindle 17 within the chamber G there is mounted a cam block 19 eccentric on the spindle in operative relation to the corresponding one of the arms 10 having a suitably curved edge 20 in the path of an appropriate portion of the block 19, so that on a rocking movenient of the block 19 a rotativemovement in one direction is imparted to the disk 9, this movement being against the normal actionv of aspring 21 secured at one end to the ear 11 and at the other end to a stud 22 on one of the face plates of the'pulley, say, the plate 3 within the chamber 6. The cam block 19 has one end of a spring 23 fast thereto,.while the other end of this spring is secured in a stud 24 fast to one face plate of the pulley, say, the face plate 3, and located within the chamber 6.

The tendency of the spring 21 is to rock the disk 9 with the arms 10 in a direction to carry the arm 10 adjacent to the cam block 19 toward the latter, and the tendency of the spring23 is to rock the cam block 19 in a direction to carry it away from engaging relation to the edge 20.

Mounted on the extension 18 of the spin-l dle 17 is a rock arm 25 shown as secured to the extension 18 by a pin 26, but the arm may be secured to the spindle extension 18 in any other appropriate manner. The arm 25 is in radial relation to the aXis of rocking of the spindle 17 and is located exterior to the pulley, and at its outer end carries a set screw 2,7 threaded through the arm 25 and held in adjusted position thereon by a lock nut 28,v The arm 2 5 projects from the spindle in a direction to carry the set screw into suoli relation to the shaft that if ,other-V wise' unimpeded the arm 25 willirock to bring the set screw 27' into engagement with the'shaftI 1.` V

Mountedion the shaft is a sleeve 29'slidablel lengthwise lofthe shaft and*` provided with a circumferential groove 30` for the Y' lengthwise of the ing 0f the cam block 19 .releasing the disk 9 to is shifted out of ,0f the spring application of a fork or other actuating device permitting the sleeve to be moved shaft and also permitting the'sleeve tov rotate with the shaft, orif need beI to permit the shaft to rotate with relation to the sleeve. The end of the sleeve 29 "toward the pulley has a tapered continuation31 with the taper walls approaching the shaft so `as to interpose between the shaft vand the set screw 27. When the sleeve 29 is moved toward the pulley for a suitable distance, the taper continuation 31 engages that end of the screw 27 which is movable l into engagement with the shaft and causes a rocking of the spindle 17 and cam block 19 in ,opposition to the tendency'of the spring 23. This rocking movement lresults in causing the cam block 19 to engage the edge 2 0 in a manner to partially rotate the disk9 so as to rock the blocks 12 about the pins 16 in a direction'tov move the cam edges 15 away from the collars 7. Then the sleeve 29 is moved` alongthe shaft away from the pulley the taperend 31 is carried out of theipath of the screw 27 with the result that the spring 23 by its normal tend-'- encyv causes a movement ofk the screw '27 f vtoward the shaft and a corresponding rock-vA out lofthe path of the arm 10 provided with the edge 20, thus j l the action of the spring 21 and causing the disk to rock in a direction bringing the cam edges 15 into cramping relation to the collars 7, whereby the pulley is clutched to the shaft or theE shaft to the pulley, as the case may be.y

This clutching action, however, is a oneway clutching action. In the particular arrangement shown the pulley may be considered as rotating clockwise as viewed in Figs. 1 and 2. S0 long as the sleeve 29 is in the path of the screw 27, and considering the pulley as the drive member, the `pulleyv remains disconnected from the shaft 1, and

although the pulley be rotated by power' not driven by the however, as t-he sleeve 29 the path of the screw 27.

applied to it, the shaft is pulley. As soon,

the spring 23 moves the cam block 19in a direction to release the disk 9 to the `action to bri ng the 21, which'thereupon causes a Y cramping rev 120 If the Vshaft l be the drive member, then 1 the pulley becomes the driven member with'- the rotative movement of the shaft tei-'iding to assist the spring 21 in maintaining a firm gripping relation between the shaft ,and the pulley, while'tlie sleeve 29vis out ofthepath ofr thescrew 27. f i i The normal tendency o-f the clutch is topart loosely ward thel clutching position and the parts must be purposely'moved from this position to disconnect the pulley from the shaft.

The pins la sustainthe clutching strain, and are made amply heavy for the purpose. The pins 16 are simply holding pins, sustaining practically no strain, and hence may be made relatively light. lf the shaft 1 be considered rotating clockwise as viewed in Figs. 1 and 2, thcnthe spring 21 need only bring the edges 15 into engagement with the collars 7 and there hold them, the clutching action being maintained by the rotative tendency of the shaft to bring the edges 15 into firmer engagement with the collars 7.

The set screw 27 provides means for taking up wear should such occur, and for setting the parts into proper relation to insure effectual grip between: the clamping surfaces.

lVhat is claimed is l. In combination with a shaft, of spaced collars fast thereon, a pulley 'loose on the shaft, cam devices on the pulley in operative relation to the collars, and operating means for the cam devices in part on the shaft and in part on the pulley, with the part on the shaft in toggle connection with the cam devices.

2. The combination with a shaft, of spaced collars fast thereon, a pulley loose on the shaft, a series of cam devices on the pulley spaced about the collars with each cam device spanning the space between the collars, and operating means for the cam devices including a member loose on the shaft between the collars and connected in toggle relation with the cam devices.

3. The combination with a shaft and a pulley loosely mounted on the shaft, of means for clutching the pulley and shaft together, comprising a clutch structure fast on the shaft and another clutch structure in mounted on the shaft and in part carried by the pulley for engagement with the clutch structure fast on the shaft, the clutch structure carried by the pulley having means imparting to it a normal tendency to move-to the clutching position and the shaft and pulley having coacting means for moving the clutch structure on the pulley in opposition to its normal tendency.

4. The combination w'th a shaft and a pulley loosely mounted thereon, of clutching means between the shaft and pulley, comprising collars fast on the shaft. a disk loosely mounted Aon the shaft and having arms projecting therefrom, clutch blocks pivoted `tothe disk and to the pulley and having cam portions in operative relation to the collars fast to the pulley, means imparting to the disk a normal tendency to move in a direction to cause the cam portions of the blocks to engage'the collars on the shaft, and means carried by the shaft and pulley and associated withthe disk to movel the latterv inopposition to its normal tendency to move the cam surfaces away from the collars.

5. The combination with a shaft and a pulley loosely mounted thereon, of clutching means'between the shaft and pulley, comprising collars fast on the shaft, a disk loosely mounted on the shaft and having arms projecting therefrom, clutch blocks pivoted to the disk and to the pulley and having cam portions in operative relation to the collars fast to the shaft, means imparting to the disk a normal tendency to move in a direction to canse the cam portions of the blocks to engage the collars on the shaft, and means carried by the shaft and pulley and associated with the disk to move the latter in opposition to its normal tendency to move the cam .surfaces away from the collarsq said last-named means comprising a rockable cam block, a spring tending to move it in one direction, an arm for moving the cam block in the opposite direction and provided with an adjustable set screw, and a sleeve slidable on the shaft and having a taper end movable into and out of the path of the set screw.

6. The combination with a shaft and pulley loosely mounted on the shaft, with the pulley provided with an interior chamber, of collars fast on the shaft within the chamber in the pulley, a disk loosely mounted on the shaft between the collars and having arms projecting therefrom in. the chamber in the pulley, blocks pivotally mounted within the pulley in straddling relation to the arms on the disk and having legs straddling the arms and pivoted thereto and terminating in cam edges in operative relation to the collars on the shaft, a spring in the pulley connected to the latter and to the disk for imparting to the disk a normal tendency lto rock in one direction, a rockable cam block within the cam pulley in operative relation to one of the arms of the disk for moving the disk in opposition to its normal tendency, a spring connected to the cam within the pulley and tending to rock the cam in a direction to release the disk, a rock arm exterior to the pulley and connected to the cam block and carrying a set screw in position to engage the shaft exterior to the pulley.y anda sleeve on the shaft movable lengthwise of the latter and having a taper portion for engaging the set screw to rock the cam block within the pulley in opposition to the spring controlling it.

7 A clutch comprising two concentrically disposed members rotatable one with relation to the other1 clutch elements fast to the inner member, other clutch members on and movable with relation to the outer clutch member and tothe clutch elements on the inner clutch member, means on and movable With relation to the inner clutch member and` connected to the clutch elements on the outer clutch member and having a normal tendency to move the outer @lu-tch elements into engagement With the inner elutelr elements, and means. carried by the. clutch members for moving the outer clutch. elements in op- Copi'es of thisvpatentr may be obtainedl for position to their normal tendency to eleot ,the nnolutohing of the Clutoh.

In testimony, that We claim the foregoing as our own, We. have hereto affixed our sig.- natures in the presence of tWo Witnesses.

JOE HRIBAR. HUTTON GIBSON. W tnesses: v

PERoY C. Grson, AGN-Es O. JOHNSON.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0'. 

